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Apparatus and method for input channel isolation within an electronic test instrument

  • US 7,113,750 B2
  • Filed: 12/16/2002
  • Issued: 09/26/2006
  • Est. Priority Date: 12/16/2002
  • Status: Expired due to Fees
First Claim
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1. Apparatus, comprising:

  • a modulator, for modulating an input signal onto a carrier signal to produce a modulated carrier signal, said modulator being coupled to a first ground reference;

    a demodulator, for receiving a representation of said modulated carrier signal and a representation of said carrier signal for demodulating said representation of modulated carrier signal to produce a demodulated signal, said demodulator being coupled to a second ground reference, said first and second ground references being electrically isolated from each other;

    an isolator for receiving said modulated carrier signal from said modulator, producing said representation of modulated carrier signal, and conveying said representation of modulated carrier signal to said demodulator while maintaining said isolation of said first and second ground references; and

    a filter, for retrieving a corresponding input signal from said demodulated signal.

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